Hi, I agree with all the other comments – I live in Florida where we reach in excess of 95 degrees F during the summer months. Any buttercream covered cake that is left in the heat runs the risk of melting – however, to keep this from happening, you must replace the butter with vegetable shortening and add flavoring to your buttercream.
I would also make sure client is made aware of how the heat and humidity may affect buttercream so if anything happens, they won’t be surprised or upset. Recommend they try to display the cake in an area that is not so hot and away from direct sunlight. Hope this helps.
DJ - Fun Fiesta Cakes
